/**
 * Copyright (C) 2024 AIDC-AI
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.langengine.core.textsplitter;

import lombok.Data;

import java.util.List;
import java.util.regex.Pattern;

/**
 * Implementation of splitting text that looks at characters.
 *
 * @author xiaoxuan.lp
 */
@Data
public class CharacterTextSplitter extends TextSplitter {

    private String separator = "\n\n";

    private boolean isSeparatorRegex = false;

    /**
     * Split incoming text and return chunks.
     *
     * @param text
     * @return
     */
    @Override
    public List<String> splitText(String text) {
        String separatorPattern = isSeparatorRegex ? separator : Pattern.quote(separator);
        List<String> splits = splitTextWithRegex(text, separatorPattern, isKeepSeparator());
        String _separator = isKeepSeparator() ? "" : separator;
        return mergeSplits(splits, _separator);
    }
}
